Honda Motorcycle RVF750R RC45 Turn Signal Bulb Size
Honda Motorcycle RVF750R RC45 front turn signal bulb size 1034 and rear turn signal bulb size P21W are specified in this replacement chart. The chart covers 1994 to 1999 production years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Honda Motorcycle RVF750R RC45 uses two distinct bulb types across its turn signal positions: the 1034 for the front and the P21W for the rear, across all model years from 1994-1999.
The 1034 is an ANSI-standard bulb used in the United States and Canada. It operates at 12V with a dual-filament configuration rated at 21/5W, and it mounts via a BAY15d bayonet base.
The dual-filament design of the 1034 means it carries two separate circuits within a single bulb, each producing a different wattage output. The higher 21W filament typically serves the turn signal function, while the lower 5W filament serves a secondary purpose such as a running or parking light.
The 1034 is a variant of the 1157 bulb. While the two share the same BAY15d base and general electrical characteristics, they are not always interchangeable due to potential differences in filament positioning and base pin offset, which can affect fitment in housings designed for one or the other.
The P21W is an ECE-standard bulb used in European and worldwide markets. It operates at 12V with a single filament rated at 21W, and it mounts via a BA15s bayonet base.
The BA15s base of the P21W and the BAY15d base of the 1034 are physically distinct. The BA15s has a single-contact base with two side pins at the same height, while the BAY15d has a dual-contact base with offset side pins. These two base types are not interchangeable.
Because the front 1034 uses a BAY15d base and the rear P21W uses a BA15s base, the front and rear turn signal bulbs on the RVF750R RC45 are not cross-compatible with each other.